org.apache.lucene.analysis.br
Class BrazilianAnalyzer

java.lang.Object
  org.apache.lucene.analysis.Analyzer
      org.apache.lucene.analysis.br.BrazilianAnalyzer

public final class BrazilianAnalyzer
extends Analyzer

Analyzer for Brazilian language. Supports an external list of stopwords (words that will not be indexed at all) and an external list of exclusions (word that will not be stemmed, but indexed).

Field Summary

static String[]

BRAZILIAN_STOP_WORDS List of typical Brazilian stopwords.

Constructor Summary

BrazilianAnalyzer()
Builds an analyzer with the default stop words (BRAZILIAN_STOP_WORDS).

BrazilianAnalyzer(File stopwords)
Builds an analyzer with the given stop words.

BrazilianAnalyzer(Map stopwords)
Builds an analyzer with the given stop words.

BrazilianAnalyzer(String[] stopwords)
Builds an analyzer with the given stop words.

Method Summary

void	setStemExclusionTable(File exclusionlist) Builds an exclusionlist from the words contained in the given file.
void	setStemExclusionTable(Map exclusionlist) Builds an exclusionlist from a Hashtable.
void	setStemExclusionTable(String[] exclusionlist) Builds an exclusionlist from an array of Strings.
TokenStream	tokenStream(String fieldName, Reader reader) Creates a TokenStream which tokenizes all the text in the provided Reader.

Methods inherited from class org.apache.lucene.analysis.Analyzer

getPositionIncrementGap, getPreviousTokenStream, reusableTokenStream, setPreviousTokenStream

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BRAZILIAN_STOP_WORDS

public static final String[] BRAZILIAN_STOP_WORDS

List of typical Brazilian stopwords.

Constructor Detail

BrazilianAnalyzer

public BrazilianAnalyzer()

Builds an analyzer with the default stop words (BRAZILIAN_STOP_WORDS).

BrazilianAnalyzer

public BrazilianAnalyzer(String[] stopwords)

Builds an analyzer with the given stop words.

BrazilianAnalyzer

public BrazilianAnalyzer(Map stopwords)

Builds an analyzer with the given stop words.

BrazilianAnalyzer

public BrazilianAnalyzer(File stopwords)
                  throws IOException

Builds an analyzer with the given stop words.

Throws:

IOException

Method Detail

setStemExclusionTable

public void setStemExclusionTable(String[] exclusionlist)

Builds an exclusionlist from an array of Strings.

setStemExclusionTable

public void setStemExclusionTable(Map exclusionlist)

Builds an exclusionlist from a Hashtable.

setStemExclusionTable

public void setStemExclusionTable(File exclusionlist)
                           throws IOException

Builds an exclusionlist from the words contained in the given file.

Throws:

IOException

tokenStream

public final TokenStream tokenStream(String fieldName,
                                     Reader reader)

Creates a TokenStream which tokenizes all the text in the provided Reader.

Specified by:

tokenStream in class Analyzer

Returns:

A TokenStream build from a StandardTokenizer filtered with StandardFilter, StopFilter, GermanStemFilter and LowerCaseFilter.